I have the Style lll/lV exhaust made by Snowline.  Over 4+ years and 450
hours I have had four separate cracks, all at the welds where a "Y" occurs.
I tried various methods of tailpipe support with no success.  I think that I
have finally found a mod that works!!  I found some flat SS #321 stock of
appropriate thickness (I can't remember exactly), and custom made a gusset
for each pipe weld.  (Two gussets for each "Y") The gussets are 3" to 3.5"
long on each leg and are fitted at the interior of each joint (not on the
side of the "Y").  Each was welded in place along both sides of the gusset
plate.  The exhaust was installed with no support for the tailpipes.  So
far, (about 40 hours), there are no cracks.

Byron Eskesen
Tucson, AZ